On Tue, Dec 22, 2015 at 05:23:11PM +0000, Andrew Chapman via
Digitalmars-d-learn wrote:
[...]
> for({int i; i = 0;} i < num; i++) {
> //string s = to!string(i);
> Customer c = Customer(i, "Customer", "99998888", i * 2);
> string result = objS.serialize(c);
> }
>
> If I uncomment the "string s" line I'm seeing a 20% increase in
> running time, which given what's going on the rest of the code is
> quite surprising. I've tried compiling with both dmd and ldc2 - it's
> the same under both.
[...]
I wonder if the slowdown is caused by GC collection cycles (because
calling to!string will allocate, and here you're making a very large
number of small allocations, which is known to cause GC performance
issues).
Try inserting this before the loop:
import core.memory;
GC.disable();
Does this make a difference in the running time?
T
--
"Uhh, I'm still not here." -- KD, while "away" on ICQ.
